<template>
 <el-container class="home-container">
        <!--页面头部区域-->
     <el-header> 
         <div>
            <img src="../assets/heima.png" alt="">
            <span>电商后台管理系统</span>
         </div>
         <el-button type="info" @click="logout">退出</el-button>
     </el-header>
        <!--页面主体区域-->
     <el-container>
       <!--侧边栏-->
       <el-aside :width="isCollpase ? '64px':'200px'">
           <div class="toggle-button" @click="toggleCollapse">|||</div>
           <!--侧边栏菜单区域-->
     <el-menu background-color="#333744" text-color="#fff" 
     active-text-color="#ffd04b" unique-opened :collapse="isCollpase"
     :collapse-transition="false" router :default-active="activePath">
         <!--一级菜单-->
          <el-submenu :index="item.id+''" v-for="item in menulist" :key="item.id">
          <!--一级菜单模板区域-->
           <template slot="title">
           <!--一级菜单图标-->
          <i :class="iconsObj[item.id]"></i>
           <!--一级菜单文本-->
          <span>{{item.authName}}</span>
           </template>
           <!--二级菜单-->
            <el-menu-item :index="'/'+subItem.path" v-for="subItem in item.children" 
            :key="subItem.id" @click="saveNavState('/'+subItem.path)">
            <template slot="title">
           <!--一级菜单图标-->
           <i class="el-icon-menu"></i>
           <!--一级菜单文本-->
          <span>{{subItem.authName}}</span>
           </template>
            </el-menu-item>
        </el-submenu>
      
    </el-menu>
       </el-aside>
     
     
     <!--右侧主体-->
       <el-main>
        <!--放置路由占位符-->
        <router-view></router-view>
       </el-main>
      </el-container>
  </el-container>
</template>

<script>
   export default{
       data(){
           return{
               menulist:[],
               iconsObj:{
                   '125':'iconfont icon-users',
                   '103':'iconfont icon-shangpin',
                   '101':'iconfont icon-tijikongjian',
                   '102':'iconfont icon-danju',
                   '145':'iconfont icon-baobiao'
               },
               isCollpase: false,
               //被激活的连接地址
               activePath:''
           }
       },
       created(){
           this.getMenuList()
           this.activePath=window.sessionStorage.getItem('activePath')
       },
       methods:{
           logout(){
               window.sessionStorage.clear();
               this.$router.push("/login");
           },
           //获取所有的菜单
         async  getMenuList(){
           const {data:res}= await this.$http.get('menus')
           if(res.meta.status!==200) return this.$message.error(res.meta.msg)
           this.menulist=res.data
           console.log(res)
           },
           //点击按钮，切换菜单的折叠与展开

           toggleCollapse(){
           this.isCollpase=!this.isCollpase
           },
           //保存链接的激活状态
           saveNavState(activePath){
            window.sessionStorage.setItem('activePath',activePath)
            this.activePath=activePath
           }
       }
   };
</script>

<style lang="less" scoped>
.home-container{
    height:100%;
}
.el-header{
     background-color:#373D41;
     display: flex;
     justify-content: space-between;
     padding-left: 0;
     align-items: center;
     color: #fff;
     font-size: 20px;
     > div{
         display: flex;
         align-items: center;
         span{
             margin-left: 18px;
         }
     }

}
.el-aside{
    background-color: #333744;
    .el-menu{
        border-right: none;
    }
}
.el-main{
    background-color: #EAEDF1;
}
.iconfont{
    margin-right:10px;
}
.toggle-button{
    background-color: #55555c;
    font-size: 10px;
    line-height: 24px;
    color: #fff;
    text-align: center;
    letter-spacing: 0.2em;
    cursor: pointer;
}
</style>